Apparatus, method and system for adjusting voltage stabilization output of power source

ABSTRACT

An apparatus, method and system for adjusting a voltage stabilization output of a power source (10). The power source (10) forms an output voltage based on a supply current. The apparatus includes a sampling module (11), a PID adjustment module (12) and a control module (13). The sampling module (11) is configured to sample the output voltage of the power source (10) to obtain a sampled voltage (S100). The PID adjustment module (12) is configured to obtain a switching frequency signal by PID control adjustment based on the sampled voltage and a preset control parameter. The PID control adjustment includes a voltage loop control adjustment and a voltage-difference-change-rate loop control adjustment (S200). The control module (13) is configured to form the supply current according to the switching frequency signal (S300). The voltage stabilization output of the power source (10) can be realized.

This application claims priority to Chinese Patent Application No.202011286849.1, filed on Nov. 17, 2020, entitled ‘apparatus, method andsystem for adjusting voltage stabilization output of power source’,which is hereby incorporated by reference in its entirety.

TECHNICAL FIELD

The present disclosure relates to a technical field of power electronicequipment, and particularly to an apparatus, method and system foradjusting a voltage stabilization output of a power source.

BACKGROUND

The power source in power and electronic devices serves as an energysupply apparatus, and its use safety and reliability are particularlyimportant. In order to ensure the electricity safety of the powersource, a stable power supply is required to achieve a stable output ofthe power source. The unstable output of the power supply is likely tocause short circuit and other situations and result in potential safetyhazards, thereby causing damages to devices such as the power source andleading to huge economic losses and casualties.

SUMMARY

An objective of the present disclosure is to provide an apparatus foradjusting a voltage stabilization output of a power source, so as torealize the voltage stabilization output of the power source. Anotherobjective of the present disclosure is to provide a system for adjustinga voltage stabilization output of a power source. Still anotherobjective of the present disclosure is to provide a method for adjustinga voltage stabilization output of a power source. Yet another objectiveof the present disclosure is to provide a computer device. Yet stillanother objective of the present disclosure is to provide a readablemedium.

In order to achieve the above objectives, an aspect of the presentdisclosure discloses an apparatus for adjusting a voltage stabilizationoutput of a power source. The power source forms an output voltage basedon a supply current. The apparatus includes a sampling module, a PIDadjustment module and a control module. The sampling module isconfigured to sample the output voltage of the power source to obtain asampled voltage. The PID adjustment module is configured to obtain aswitching frequency signal by PID control adjustment based on thesampled voltage and a preset control parameter. The PID controladjustment includes a voltage loop control adjustment and avoltage-difference-change-rate loop control adjustment. The controlmodule is configured to form the supply current according to theswitching frequency signal.

The present disclosure further discloses a system for adjusting avoltage stabilization output of a power source, including the apparatusfor adjusting the voltage stabilization output of the power source asdescribed above and the power source.

The present disclosure further discloses a method for adjusting avoltage stabilization output of a power source, including:

-   -   sampling an output voltage of the power source to obtain a        sampled voltage;    -   obtaining a switching frequency signal by PID control adjustment        based on the sampled voltage and a preset control parameter,        with the PID control adjustment including a voltage loop control        adjustment and a voltage-difference-change-rate loop control        adjustment;    -   forming a supply current according to the switching frequency        signal.

The present disclosure further discloses a charging control system,including a memory, a processor, and a computer program stored in thememory and executable on the processor. The processor is configured toexecute the program to implement the method as described above.

The present disclosure further discloses a computer device, including amemory, a processor, and a computer program stored in the memory andexecutable on the processor. The processor is configured to execute theprogram to implement the method as described above.

The present disclosure further discloses a computer-readable mediumstoring a computer program. When being executed by a processor, theprogram implements the method as described above.

In the present disclosure, the sampling module samples an output voltageof the power source to obtain a sampled voltage, and the PID adjustmentmodule performs PID control adjustment on the sampled voltage based on apreset control parameter to obtain a switching frequency signal.Therefore, a supply current can be formed according to the switchingfrequency signal regenerated after the PID control adjustment, therebyenabling the power supply to form the output voltage based on the supplycurrent. In the present disclosure, by sampling the output voltage ofthe power source, and adjusting the supply current of the output voltageof the power source by the PID control adjustment including the voltageloop control adjustment and voltage-difference-change-rate loop controladjustment, the collection and the control adjustment of the real-timeoutput voltage of the power source can be achieved, thereby ensuring thestabilization output of the power source. In summary, in the presentdisclosure, the magnitude of the supply current of the power source isprecisely controlled through the closed-loop PID control adjustment,thereby precisely controlling the output voltage of the power source,and improving the supply stability of the power source.

BRIEF DESCRIPTION OF THE DRAWINGS

For a clearer illustration of technical features in the embodiments ofthe present disclosure, a brief description of the drawings for theembodiments will be given below. Obviously, the drawings described belowinvolve only some embodiments of this disclosure. For those of ordinaryskill in the art, other drawings can be derived from these drawingswithout any inventive efforts.

FIG. 1 illustrates a structural diagram of an apparatus for adjusting avoltage stabilization output of a power source according to anembodiment of the present disclosure;

FIG. 2 illustrates a structural diagram of a sampling module of anapparatus for adjusting a voltage stabilization output of a power sourceaccording to an embodiment of the present disclosure;

FIG. 3 illustrates a structural diagram of a control module of anapparatus for adjusting a voltage stabilization output of a power sourceaccording to an embodiment of the present disclosure;

FIG. 4 illustrates a flowchart of a method for adjusting a voltagestabilization output of a power source according to an embodiment of thepresent disclosure;

FIG. 5 illustrates a flowchart of S100 of a method for adjusting avoltage stabilization output of a power source according to anembodiment of the present disclosure;

FIG. 6 illustrates a flowchart of S200 of a method for adjusting avoltage stabilization output of a power source according to anembodiment of the present disclosure;

FIG. 7 illustrates a flowchart of S300 of a method for adjusting avoltage stabilization output of a power source according to anembodiment of the present disclosure;

FIG. 8 illustrates a structural diagram of a computer device suitablefor implementing an embodiment of the present disclosure.

DETAILED DESCRIPTION

The technical solutions in the embodiments of the present disclosurewill be clearly and completely described below in conjunction with thedrawings. Obviously, those described are merely a part, rather than all,of the embodiments of the present disclosure. All other embodimentsderived by persons skilled in the art from the embodiments of thepresent disclosure without making inventive efforts shall fall withinthe protection scope of the present disclosure.

In the prior art, it is necessary to ensure the safety and performancereliability of the supply capabilities of various power sources in thepower and electronic devices. For example, with the popularization ofnew energy vehicles, the electricity safety thereof during chargingbecomes a growing concern. The vehicle charging apparatus requires astable supply from a power source 10. If the power source 10 isunstable, especially when the power source 10 is short-circuited,important components of the vehicle may be burnt during charging,causing huge economic losses and even casualties in severe cases. So thevoltage stabilization control of the power source 10 is a problemurgently to be solved. Therefore, the present disclosure provides a modefor adjusting a voltage stabilization output of a power source, whichprecisely controls the magnitude of the supply current of the powersource 10 by closed-loop PID (proportional, integral and differential)control adjustment, so as to precisely control the output voltage of thepower source 10, improve the stability of the output voltage of thepower source 10, and ensure the safety and reliability of the powersupply device such as the charging apparatus.

According to an aspect of the present disclosure, an embodimentdiscloses an apparatus for adjusting a voltage stabilization output of apower source. As illustrated in FIG. 1 , in the embodiment, the powersource 10 forms an output voltage based on the supply current. Theapparatus includes a sampling module 11, a PID adjustment module 12 anda control module 13.

The sampling module 11 is configured to sample the output voltage of thepower source 10 to obtain a sampled voltage. The PID adjustment module12 is configured to obtain a switching frequency signal by PID controladjustment based on the sampled voltage and a preset control parameter.The PID control adjustment includes a voltage loop control adjustmentand a voltage-difference-change-rate loop control adjustment. Thecontrol module 13 is configured to form a supply current according tothe switching frequency signal.

In the present disclosure, the sampling module 11 samples the outputvoltage of the power source 10 to obtain a sampled voltage, and the PIDadjustment module 12 performs PID control adjustment on the sampledvoltage based on a preset control parameter to obtain a switchingfrequency signal. Therefore, a supply current can be formed according tothe switching frequency signal regenerated after the PID controladjustment, thereby enabling the power supply 10 to form the outputvoltage based on the supply current. In the present disclosure, bysampling the output voltage of the power source 10, and adjusting thesupply current of the output voltage of the power source 10 by the PIDcontrol adjustment including the voltage loop control adjustment andvoltage-difference-change-rate loop control adjustment, the collectionand the control adjustment of the real-time output voltage of the powersource 10 can be achieved, thereby ensuring the stabilization output ofthe power source 10. In summary, in the present disclosure, themagnitude of the supply current of the power source 10 is preciselycontrolled by the closed-loop PID control adjustment, thereby preciselycontrolling the output voltage of the power source 10, and improving thesupply stability of the power source.

In an exemplary embodiment, the sampling module is configured to collectthe output voltage of the power source to obtain the sampled voltage. Amode of the collection includes at least one selected from the group ofa voltage division collection, a Hall effect collection and a voltagedivision chip collection. In practical applications, the sampled voltagemay also be obtained by collecting the output voltage in other modes,which is not limited in the present disclosure. In order to collect theoutput voltage of the power source 10 in real time and reduce thecomplexity of signal processing, in an exemplary embodiment, thesampling module 11 is configured to divide the output voltage of thepower source 10 to obtain a sampled voltage. Specifically, the outputvoltage of the power source 10 is collected in proportion by means ofvoltage division, so that the collected sampled voltage represents themagnitude of the output voltage of the power source 10. Since thesampled voltage is a part of the output voltage collected in aproportion, the large output voltage is converted into a small voltage.Therefore, during subsequent processing of the voltage signal or thecurrent signal, the post-processing signal amount is small, and thevoltage stabilization adjustment of the output voltage of the powersource 10 can be realized by a simple circuit, without high requirementsfor circuit elements.

As an exemplary embodiment, the sampling module 11 includes a firstresistor group, a second resistor group, a capacitor C1 and ananalog-to-digital converter ADC. Each of the first resistor group andthe second resistor group includes at least one resistor, and if thereare a plurality of the resistors, at least two of which are sequentiallyconnected in series, or connected in parallel and then connected inseries with other resistors.

The first resistor group includes a first end connected to a signaloutput end OUT1 of the power source 10, and a second end connected to afirst end of the second resistor group, a first end of the capacitor C1,and the analog-to-digital converter ADC, respectively. The signal outputend is configured to output the output voltage. The analog-to-digitalconverter ADC is configured to output the sampled voltage. A second endof the second resistor group and a second end of the capacitor C1 areconnected to the ground GND, respectively.

It can be understood that the first resistor group and the secondresistor group divide the output voltage of the power source 10, and ananalog sampled voltage is obtained through a voltage drop of the firstresistor group and transmitted to the analog-to-digital converter ADC.The analog-to-digital converter ADC converts the analog sampled voltageinto a digital sampled voltage and then transmits the digital sampledvoltage to the PID adjustment module 12 for PID control adjustment. Thevoltage value of the sampled voltage obtained by voltage division may beobtained based on the resistance values of the first resistor group andthe second resistor group and the output voltage. The resistance valuesof the first resistor group and the second resistor group may beflexibly set by those skilled in the art according to actualrequirements for the purpose of adjusting the sampled voltage, which isnot limited in the present disclosure.

In a specific example, as illustrated in FIG. 2 , the sampling module 11includes a first resistor group, a second resistor group, a capacitor C1and an analog-to-digital converter ADC. The first resistor groupincludes a sixth resistor R6, a seventh resistor R7, and an eighthresistor R8. The second resistor group includes a ninth resistor R9. Thesixth resistor R6, the seventh resistor R7, and the eighth resistor R8are sequentially connected in series and then connected to the samplingmodule 11. That is, a first end of the sixth resistor R6 is connected tothe signal output end OUT1 of the power source 10, and a second endthereof is connected to a first end of the seventh resistor R7. A secondend of the seventh resistor R7 is connected to a first end of the eighthresistor R8, and a second end of the eighth resistor R8 is connected toa first end of the ninth resistor R9, a first end of the capacitor C1and the analog-to-digital converter ADC, respectively. A second end ofthe ninth resistor R9 is connected to the ground GND. The first resistorgroup is configured as a plurality of resistors connected in series, sothat on one hand, the resistance value of the first resistor group canbe increased and the sampled voltage can be reduced to facilitate theprocessing; and on the other hand, by adopting a plurality of resistorsconnected in series rather than one large resistor, the problem of alarge volume can be avoided.

In an exemplary embodiment, in order to achieve a precise PID controladjustment, the preset control parameter includes a target voltage, andthe PID adjustment module 12 includes a voltage loop controller for thevoltage loop control adjustment and a voltage-difference-change-rateloop controller for the voltage-difference-change-rate loop controladjustment. Exemplarily, the PID adjustment module 12 may be implementedby a microcontroller (MCU).

The voltage loop controller is configured to obtain an actual voltagedifference based on the target voltage and the sampled voltage, andobtain a voltage change rate control amplitude based on the actualvoltage difference.

The voltage-difference-change-rate loop controller is configured toobtain a target voltage change rate based on the voltage change ratecontrol amplitude, obtain an actual voltage change rate based on theactual voltage difference, and obtain a switching frequency signal basedon the target voltage change rate and the actual voltage change rate.

In an optional embodiment, a corresponding target voltage may be set forthe sampled voltage, and the actual voltage difference is a differencebetween the target voltage and the sampled voltage collected in realtime. In other embodiments, a corresponding target voltage may also beset for the output voltage of the power source 10 corresponding to thesampled voltage, and the actual voltage difference is a differencebetween the target voltage and the output voltage converted from thesampled voltage. The sampled voltage may be converted based onrelationships between the sampled voltage in the sampling circuit andthe resistance values and the output voltages of the first resistorgroup and the second resistor group. In addition, for the voltagedifference obtained in either of the above modes, it is necessary to seta corresponding PID control adjustment algorithm of the PID adjustmentmodule 12 to adjust the input voltage difference to obtain the switchingfrequency signal. Those skilled in the art can make relevant settingsaccording to actual needs, which will not be described herein.

In order to improve the precision of the PID control adjustment, in theembodiment, the digital sampled voltage output from theanalog-to-digital converter ADC is further converted to obtain theactual output voltage. The PID adjustment module 12 further obtains theswitching frequency signal by the PID control adjustment based on theobtained output voltage and the preset control parameter.

The voltage loop controller is configured to obtain an actual voltagedifference based on the target voltage and the sampled voltage, andobtain a voltage change rate control amplitude based on the actualvoltage difference, that is, the voltage loop controller can realize thevoltage loop control adjustment. In a specific example, the voltage loopcontroller may calculate the voltage change rate control amplitudethrough the following PID control adjustment algorithm.

${Q(t)} = {{k_{p}{e_{c}(t)}} + {k_{i}{\int_{0}^{t}{{e_{c}(t)}{dt}}}} + {k_{d}\frac{d{e_{c}(t)}}{dt}}}$

-   -   where Q(t) is a voltage change rate control amplitude at timing        t, k_(p) is a proportional term correction coefficient of the        voltage loop controller, k_(i) is an integral term correction        coefficient of the voltage loop controller, k_(d) is a        differential term correction coefficient of the voltage loop        controller, and e_(c)(t) is a difference between a given target        voltage Vdt and an actually detected output voltage Vt, i.e.,        e_(c)(t)=(Vt−Vdt)

Pd(t)=(Q(t)−Q(t−1))/dt

-   -   where Pd (t) is a target voltage change rate at timing t, Q(t)        is a voltage change rate control amplitude at timing t, Q(t−1)        is a voltage change rate control amplitude at timing t−1, and dt        is a period of PID adjustment.

The voltage-difference-change-rate loop controller is configured toobtain a target voltage change rate based on the voltage change ratecontrol amplitude, obtain an actual voltage change rate based on theactual voltage difference, and obtain the switching frequency signalbased on the target voltage change rate and the actual voltage changerate, that is, the voltage-difference-change-rate loop controller canrealize the voltage-difference-change-rate loop control adjustment. In aspecific example, the difference between the target voltage change rateand the actual voltage change rate is input to thevoltage-difference-change-rate loop controller, which may calculate theswitching frequency signal through the following PID control adjustmentalgorithm.

${P(t)} = {{k_{i - p}{e_{p}(t)}} + {k_{i - i}{\int_{0}^{t}{{e_{p}(t)}{dt}}}} + {k_{i - d}\frac{d{e_{p}(t)}}{dt}}}$

-   -   where P(t) is a switching frequency signal, k_(i−p) a        proportional term correction coefficient of the        voltage-difference-change-rate loop controller, k_(i−i) is an        integral term correction coefficient of the        voltage-difference-change-rate loop controller, k_(i−d) is a        differential term correction coefficient of the        voltage-difference-change-rate loop controller, and e_(P)(t) is        a difference between a given target voltage change rate and the        actual voltage change rate. The actual voltage change rate is        equal to e_(c)/dt. It should be noted that each coefficient in        the embodiment can be selected by those skilled in the art        according to experiences, which is not limited in the present        disclosure.

In an exemplary embodiment, the control module 13 includes a switchingelement Q. The control module 13 is configured to control, according tothe switching frequency signal, the switching element Q to conduct orcut off a path between a power source end VDD and a supply currentoutput end OUT2, so as to form a supply current. It can be understoodthat the switching element Q may be controlled to be switched on orswitched off according to the switching frequency signal, so as tocontrol whether or not to output the current of the power source endVDD, thereby forming the supply current and adjusting the output voltageof the power source 10.

In a specific example, the control module 13 may be implemented by aspecific circuit structure. Specifically, as illustrated in FIG. 3 , thecontrol module 13 includes a third resistor R3, a fourth resistor R4,and the switching element Q. The third resistor R3 and the fourthresistor R4 can realize a current limiting function.

The third resistor R3 includes a first end configured to receive theswitching frequency signal, and a second end connected to a control endG of the switching element Q. The switching element Q includes a firstend D connected to the power source end VDD, and a second end Sconnected to a first end of the fourth resistor R4 and the supplycurrent output end OUT2, respectively. A second end of the fourthresistor R4 is connected to the ground GND.

It can be understood that the working principle of this specificembodiment is described by taking a first level as a high level, asecond level as a low level, and the switching element Q as an NMOS. Itshould be noted that the embodiment is described by taking the firstlevel as the high level, the second level as the low level, and theswitching element Q as the NMOS. In practical applications, by flexiblysetting the circuit structure of each module, the first level may alsobe a low level, the second level may also be a high level, and theswitching element Q may also be a PMOS or any other switching element Qcapable of realizing the same function, which is not limited in thepresent disclosure. Therefore, other technical solutions having the sameinventive concept as the present disclosure should also fall within theprotection scope of the present disclosure.

When the switching frequency signal is at a high level, the switchingelement Q is switched on in response to the high level, thereby thepower supply end VDD is conducted with the supply current output end OUT2. Under the action of the power source end VDD, the supply currentoutput end OUT2 outputs the supply current to the power source 10 sothat the power source 10 outputs a corresponding output voltage. Whenthe switching frequency signal is at a low level, the switching elementQ is switched off in response to the low level, the power source end VDDis cut off from the supply current output end OUT2, and there is nooutput from the supply current output end OUT2. Therefore, according tothe present disclosure, the switching frequency signal is obtainedaccording to the output voltage of the power source 10 through the PIDcontrol adjustment, and the input of the supply current is controlledthrough the switching frequency signal, thereby achieving the purpose ofadjusting the output voltage of the power source 10, and ensuring thestabilized voltage output of the power source.

In an exemplary embodiment, the control module 13 further includes afifth resistor R5. The fifth resistor R5 includes a first end connectedto the second end of the third resistor R3 and the control end of theswitching element Q, respectively, and a second end connected to theground GND.

It can be understood that the control module 13 further includes a fifthresistor R5, which is an anti-interference pull-down resistor. That is,when the voltage of the switching frequency signal is floated due tointerference, the fifth resistor R5 can reduce the voltage of theswitching frequency signal under interference to a certain extent, andpulling down the voltage of the switching frequency signal below athreshold voltage of the switching element Q as much as possible, so asto prevent the switching element Q from being switched on by mistake andenhance the anti-interference strength of the control module 13.

It should be noted that as can be understood by those skilled in theart, the switching element Q in the embodiment may be a transistor,including an N-type transistor and a P-type transistor, and varioussignals at high and low levels should be matched with the model of thetransistor to realize the corresponding function. As known to thoseskilled in the art, a low level signal is required to turn on the P-typetransistor, and a high level signal is required to turn on the N-typetransistor, so that the N-type transistor or the P-type transistor isused while setting a level of a gate electrode (control end) thereof torealize the corresponding on/off function, thereby achieving the purposeof data reading in the present disclosure. In embodiments of thisdisclosure, the first end of the transistor may be a source electrodeand the second end may be a drain electrode, or vice versa, which is notlimited in the present disclosure and may be properly selected accordingto the type of the transistor.

In addition, the transistor provided by the embodiment of the presentdisclosure may be a field effect transistor, which may be an enhancementmode field effect transistor or a depletion mode field effecttransistor, and is not limited in the present disclosure.

Based on the same principle, the embodiment further discloses a systemfor adjusting a voltage stabilization output of a power source, whichincludes the power source and the apparatus for adjusting the voltagestabilization output of the power source according to the embodiment.

Since the principle of the system for solving the problem is similar tothat of the above apparatus, the apparatus as described above may bereferred to for implementation of the system, and the repetitivedescription is omitted herein.

Based on the same principle, the embodiment further discloses a methodfor adjusting a voltage stabilization output of a power source. Asillustrated in FIG. 4 , in an embodiment, the method includes:

-   -   S100: sampling an output voltage of a power source 10 to obtain        a sampled voltage.    -   S200: obtaining a switching frequency signal by PID control        adjustment based on the sampled voltage and a preset control        parameter, with the PID control adjustment including a voltage        loop control adjustment and a voltage-difference-change-rate        loop control adjustment.    -   S300: forming a supply current according to the switching        frequency signal.

In an exemplary embodiment, as illustrated in FIG. 5 , in the S100,sampling the output voltage of a power source 10 to obtain the sampledvoltage specifically includes:

-   -   S110: collecting the output voltage of the power source 10 to        obtain the sampled voltage. A mode of the collection includes at        least one selected from the group of a voltage division        collection, a Hall effect collection and a voltage division chip        collection.

In an exemplary embodiment, as illustrated in FIG. 6 , the presetcontrol parameter includes a target voltage, and in the S200, obtainingthe switching frequency signal by PID control adjustment based on thesampled voltage and the preset control parameter, with the PID controladjustment including the voltage loop control adjustment and thevoltage-difference-change-rate loop control adjustment specificallyincludes:

-   -   S210: obtaining an actual voltage difference based on the target        voltage and the sampled voltage, and obtaining a voltage change        rate control amplitude based on the actual voltage difference.    -   S220: obtaining a target voltage change rate based on the        voltage change rate control amplitude, obtaining an actual        voltage change rate based on the actual voltage difference, and        obtaining the switching frequency signal based on the target        voltage change rate and the actual voltage change rate.

In an exemplary embodiment, as illustrated in FIG. 7 , in the S300,forming the supply current according to the switching frequency signalspecifically includes:

-   -   S310: controlling, according to the switching frequency signal,        the switching element Q to conduct or cut off a path between a        power source end VDD and a supply current output end OUT2 to        form a supply current.

Since the principle of the method for solving the problem is similar tothat of the above apparatus, the apparatus as described above may bereferred to for implementation of the method, and the repetitivedescription is omitted herein.

The system, apparatus, module or unit described forth in the embodimentsmay be implemented by a computer chip or an entity, or by a producthaving a certain function, specifically. The present disclosure furtherdiscloses a charging control system, including a memory, a processor,and a computer program stored in the memory and executable on theprocessor, and when the processor is configured to execute the program,to implement the method described in the embodiments. A typical devicefor implementing is a computer device, and specifically, the computer,for example, a personal computer, a laptop computer, a cellular phone, acamera phone, a smart phone, a personal digital assistant, a mediaplayer, a navigation device, an email device, a game console, a tabletcomputer, a wearable device, or any combination thereof.

In a typical example, the computer device specifically includes amemory, a processor, and a computer program stored in the memory andexecutable on the processor, and when the processor is configured toexecute the program, to implement the above method.

Next, referring to FIG. 8 which illustrates a structural diagram of acomputer device 600 suitable for implementing an embodiment of thepresent disclosure.

As illustrated in FIG. 8 , the computer system 600 includes a centralprocessing unit (CPU) 601 which may perform various appropriate worksand processing according to a program stored in a read-only memory (ROM)602 or a program loaded into a random-access memory (RAM) 603 from astorage portion 608. The RAM 603 further stores various of programs anddata required for operations by the system 600. The CPU 601, the ROM602, and the RAM 603 are connected to each other via a bus 604. Aninput/output (I/O) interface 605 is also connected to the bus 604.

The following components are connected to the I/O interface 605: aninput portion 606 including a keyboard, a mouse, etc.; an output portion607 including a cathode ray tube (CRT), a liquid crystal feedback (LCD),a speaker, etc.; a storage portion 608 including a hard disk, etc.; anda communication portion 609 including a network interface card such as aLAN card, a modem, etc. The communication portion 609 performscommunication processing via a network such as the Internet. A driver610 is also connected to the I/O interface 605 as needed. A removablemedium 611, such as a magnetic disk, an optical disk, a magneto-opticaldisk, a semiconductor memory, etc., is installed on the driver 610 asneeded, so that a computer program read therefrom is installed on thestorage portion 608 as required.

Particularly, according to an embodiment of the present disclosure, theprocedure described above with reference to the flowchart may beimplemented as a computer software program. For example, the embodimentof the present disclosure includes a computer program product includinga tangibly computer program embodied on a machine-readable medium, andthe computer program includes program codes for performing the methodillustrated in the flowchart. In such embodiment, the computer programsmay be downloaded and installed from a network via the communicationpart 709, and/or installed from the removable medium 611.

The computer-readable medium includes permanent and non-permanent,removable and non-removable media, which can realize the informationstorage in any method or technique. The information may be computerreadable instructions, data structures, program modules or other data.An example of the computer storage medium includes, but not limited to,a phase change memory (PRAM), a static random access memory (SRAM), adynamic random access memory (DRAM), other types of random access memory(RAM), a read-only memory (ROM), an electrically-erasable programmableread-only memory (EEPROM), a flash memory or other memory techniques, acompact disk read only memory (CD-ROM), a digital versatile disc (DVD)or other optical storages, magnetic cassette tapes, magnetic diskettesor other magnetic storage device or any other non-transmission medium,which can be used for the storage of information accessible to acomputing device. According to the definitions herein, the computerreadable medium does not include any temporary computer readable media(transitory media), such as modulated data signal and carrier wave.

For convenience of description, the above-described devices are brokendown into various units by functionality. However, the functions of thevarious units may be realized in one or more hardware elements whenimplementing the present disclosure.

This disclosure is set forth by referring to flow charts and/or blockdiagrams for the methods, devices (systems), and computer programproducts of the embodiments. It should be understood that each processand/or block of the flow charts and/or block diagrams as well ascombinations of the processes and/or boxes of the flow charts and/orblock diagrams can be realized by computer program instructions. Thesecomputer program instructions can be provided to general-purposecomputers, special-purpose computers, embedded processors or theprocessors of other programmable data processing devices to produce amachine, so that an apparatus for implementing the functions designatedin one or more processes of the flowcharts and/or one or more blocks ofthe block diagrams can be produced by the instructions executed by theprocessor of the computer or other programmable data processing device.

These computer program instructions can also be stored in acomputer-readable storage medium which can guide a computer or otherprogrammable data processing device to operate in a particular way, sothat an article of manufacture including an instruction apparatus can beproduced by the instructions stored in the storage medium, with theinstruction apparatus implementing the functions designated in one ormore processes of the flowcharts and/or one or more blocks of the blockdiagram.

These computer program instructions may also be loaded onto a computeror other programmable data processing device to make the computer orother programmable data processing device perform a sequence ofcomputer-implemented operations, so that the instructions executed bythe computer or other programmable data processing device realize one ormore processes of the flowcharts and/or one or more blocks of the blockdiagram.

Further to be noted, the term “comprise”, “include” or any other wordsintends to cover the non-exclusive inclusions, so that a process, amethod, a commodity or a device including a series of elements includesnot only those elements, but also other elements not explicitly listed,or further include inherent elements of such process, method, commodityor device. In a case where there is no further limitation, the elementsdefined by a sentence “comprising a . . . ” do not exclude otheridentical elements existing in the process, method, commodity or deviceincluding the elements.

One skilled in the art should appreciate that the embodiments of thepresent disclosure can be provided as a method, a system or a computerprogram product. Therefore, the present disclosure can take the form ofa full hardware embodiment, a full software embodiment, or an embodimentcombining software and hardware. Moreover, the present invention cantake the form of a computer program product implemented on one or morecomputer usable storage mediums (including, but not limited to, amagnetic disc memory, CD-ROM, optical storage, etc.) including thereincomputer usable program codes.

The present application may be described in the general context ofcomputer-executable instructions executed by a computer, such as programmodules. In general, program modules include routines, programs,objects, components, data structures, etc., that perform specific tasksor implement specific abstract data types. The embodiments of thepresent disclosure may also be implemented in a distributed computingenvironment. In these distributed computing environments, tasks areperformed by a remote processing device connected via a communicationnetwork. In a distributed computing environment, the program modules maybe located in local and remote computer storage media, including storagedevices.

In this disclosure, the embodiments are described progressively, withthe focus being put on differences from other embodiments. For the sameor similar parts among the various embodiments, reference may be made toeach other. In particular, the system embodiment is described simply,since it is substantially similar to the method embodiment, and pleaserefer to the descriptions of the method embodiment for the relevantportion.

Those described above are just embodiments of the present disclosure,rather than limitations thereto. For those skilled in the art, thepresent disclosure may have various amendments or variations. Anyamendment, equivalent substitution, improvement, etc. made under thespirit and principle of the present disclosure should fall within thescope of the claims of the present disclosure.

1. An apparatus for adjusting a voltage stabilization output of a powersource, wherein the power source forms an output voltage based on asupply current, and the apparatus comprises a sampling module, a PIDadjustment module and a control module, wherein: the sampling module isconfigured to sample the output voltage of the power source to obtain asampled voltage; the PID adjustment module is configured to obtain aswitching frequency signal by PID control adjustment based on thesampled voltage and a preset control parameter, wherein the PID controladjustment comprises a voltage loop control adjustment and avoltage-difference-change-rate loop control adjustment; and the controlmodule is configured to form the supply current according to theswitching frequency signal.
 2. The apparatus for adjusting the voltagestabilization output of the power source according to claim 1, whereinthe sampling module is configured to collect the output voltage of thepower source to obtain the sampled voltage.
 3. The apparatus foradjusting the voltage stabilization output of the power source accordingto claim 2, wherein a mode of the collection comprises at least oneselected from the group of a voltage division collection, a Hall effectcollection and a voltage division chip collection.
 4. The apparatus foradjusting the voltage stabilization output of the power source accordingto claim 2, wherein the sampling module comprises a first resistorgroup, a second resistor group, a capacitor and an analog-to-digitalconverter, wherein: each of the first resistor group and the secondresistor group comprises at least one resistor, and if there are aplurality of the resistors, at least two of the plurality of theresistors are sequentially connected in series, or connected in paralleland then connected in series with other resistors; the first resistorgroup comprises a first end connected to a signal output end of thepower source, and a second end connected to a first end of the secondresistor group, a first end of the capacitor, and the analog-to-digitalconverter, respectively, wherein the signal output end is configured tooutput the output voltage; the analog-to-digital converter is configuredto output the sampled voltage; and a second end of the second resistorgroup and a second end of the capacitor are connected to the ground,respectively.
 5. The apparatus for adjusting the voltage stabilizationoutput of the power source according to claim 1, wherein: the presetcontrol parameter comprises a target voltage, and the PID adjustmentmodule comprises a voltage loop controller for the voltage loop controladjustment and a voltage-difference-change-rate loop controller for thevoltage-difference-change-rate loop control adjustment; the voltage loopcontroller is configured to obtain an actual voltage difference based onthe target voltage and the sampled voltage, and obtain a voltage changerate control amplitude based on the actual voltage difference; and thevoltage-difference-change-rate loop controller is configured to obtain atarget voltage change rate based on the voltage change rate controlamplitude, obtain an actual voltage change rate based on the actualvoltage difference, and obtain a switching frequency signal based on thetarget voltage change rate and the actual voltage change rate.
 6. Theapparatus for adjusting the voltage stabilization output of the powersource according to claim 1, wherein the control module comprises aswitching element, and wherein the control module is configured tocontrol, according to the switching frequency signal, the switchingelement to conduct or cut off a path between a power source end and asupply current output end to form the supply current.
 7. The apparatusfor adjusting the voltage stabilization output of the power sourceaccording to claim 6, wherein the control module comprises a thirdresistor, a fourth resistor, and the switching element, and wherein: thethird resistor comprises a first end configured to receive the switchingfrequency signal, and a second end connected to a control end of theswitching element; the switching element comprises a first end connectedto the power source end, and a second end connected to a first end ofthe fourth resistor and the supply current output end, respectively; anda second end of the fourth resistor is connected to the ground.
 8. Theapparatus for adjusting the voltage stabilization output of the powersource according to claim 7, wherein the control module furthercomprises a fifth resistor, and wherein the fifth resistor comprises afirst end connected to a second end of the third resistor and thecontrol end of the switching element, respectively, and a second endconnected to the ground.
 9. A system for adjusting a voltagestabilization output of a power source, comprising the apparatus foradjusting the voltage stabilization output of the power source accordingto claim 1, and the power source.
 10. A method for adjusting a voltagestabilization output of a power source, comprising: sampling an outputvoltage of the power source to obtain a sampled voltage; obtaining aswitching frequency signal by PID control adjustment based on thesampled voltage and a preset control parameter, with the PID controladjustment comprising a voltage loop control adjustment and avoltage-difference-change-rate loop control adjustment; and forming asupply current according to the switching frequency signal.
 11. Themethod for adjusting the voltage stabilization output of the powersource according to claim 10, wherein sampling the output voltage of thepower source to obtain the sampled voltage specifically comprises:collecting the output voltage of the power source to obtain the sampledvoltage.
 12. The method for adjusting the voltage stabilization outputof the power source according to claim 11, wherein a mode of thecollection comprises at least one selected from the group of a voltagedivision collection, a Hall effect collection and a voltage divisionchip collection.
 13. The method for adjusting the voltage stabilizationoutput of the power source according to claim 10, wherein the presetcontrol parameter comprises a target voltage, and wherein obtaining theswitching frequency signal by PID control adjustment based on thesampled voltage and the preset control parameter, with the PID controladjustment comprising the voltage loop control adjustment and thevoltage-difference-change-rate loop control adjustment specificallycomprises: obtaining an actual voltage difference based on the targetvoltage and the sampled voltage, and obtaining a voltage change ratecontrol amplitude based on the actual voltage difference; and obtaininga target voltage change rate based on the voltage change rate controlamplitude, obtaining an actual voltage change rate based on the actualvoltage difference, and obtaining the switching frequency signal basedon the target voltage change rate and the actual voltage change rate.14. The method for adjusting the voltage stabilization output of thepower source according to claim 10, wherein forming the supply currentaccording to the switching frequency signal specifically comprises:controlling, according to the switching frequency signal, the switchingelement to conduct or cut off a path between a power source end and asupply current output end to form a supply current. 15-17. (canceled)